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Modeling of Hydraulic Fracture of Concrete Gravity Dams by Stress-Seepage-Damage Coupling Model
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-04-23
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
High-pressure hydraulic fracture (HF) is an important part of the safety assessment of high concrete dams.
A stress-seepage-damage coupling model based on the finite element method is presented and first applied in HF in concrete dams.
The coupling model has the following characteristics: (1) the strain softening behavior of fracture process zone in concrete is considered; (2) the mesh-dependent hardening technique is adopted so that the fracture energy dissipation is not affected by the finite element mesh size; (3) four coupling processes during hydraulic fracture are considered.
By the damage model, the crack propagation processes of a 1 : 40 scaled model dam and Koyna dam are simulated.
The results are in agreement with experimental and other numerical results, indicating that the damage model can effectively predict the carrying capacity and the crack trajectory of concrete gravity dams.
Subsequently, the crack propagation processes of Koyna dam using three notches of different initial lengths are simulated by the damage model and the coupling model.
And the influence of HF on the crack propagation path and carrying capacity is studied.
The results reveal that HF has a significant influence on the global response of the dam.
American Psychological Association (APA)
Sha, Sha& Zhang, Guoxin. 2017. Modeling of Hydraulic Fracture of Concrete Gravity Dams by Stress-Seepage-Damage Coupling Model. Mathematical Problems in Engineering،Vol. 2017, no. 2017, pp.1-15.
https://search.emarefa.net/detail/BIM-1192402
Modern Language Association (MLA)
Sha, Sha& Zhang, Guoxin. Modeling of Hydraulic Fracture of Concrete Gravity Dams by Stress-Seepage-Damage Coupling Model. Mathematical Problems in Engineering No. 2017 (2017), pp.1-15.
https://search.emarefa.net/detail/BIM-1192402
American Medical Association (AMA)
Sha, Sha& Zhang, Guoxin. Modeling of Hydraulic Fracture of Concrete Gravity Dams by Stress-Seepage-Damage Coupling Model. Mathematical Problems in Engineering. 2017. Vol. 2017, no. 2017, pp.1-15.
https://search.emarefa.net/detail/BIM-1192402
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1192402